"You've led us through half the ship, and to what...?"[Threepio] broke off, staring in disbelief as the squat robot reached up with one clawed limb and snapped the seal on a lifeboat hatch...

Artoo was already working his way into the cramped boat pod. It was just large enough to hold several humans, and its design was not laid out to accommodate mechanicals. Artoo had some trouble negotiating the awkward little compartment.

Somehow Artoo had succeeded in wedging his body into position in front of the miniature control board.

Muttering the electronic equivalent of consigning his soul to the unknown, the lanky robot jumped into the life pod. "I'm going to regret this," he muttered more audibly as Artoo activated the safety door behind him. The smaller robot flipped a series of switches, snapped back a cover, and pressed three buttons in a certain sequence. With the thunder of explosive latches the life pod ejected from the crippled fighter...

Threepio stared, mesmerized, out the small viewport set in the front of the tiny escape pod as the hot yellow eye of Tatooine began to swallow them up.

There were a variety of early approaches to this idea - see spacecraft rescue for more details about these programs. Also, Werner von Braun also worked on escape pod designs in the 1960's. Also compare to the Survival Bubble (Beach Ball) from Footfall (1985) by Larry Niven (w/J. Pournelle).

Compare to the life-tubes from Salvage in Space (1931) by Jack Williamson and the life ship from The Invisible World (1940) by Ed Earl Repp.